Patent US4456233A successfully refreshed from Google Patents.
US4456233A
Expired / Lapsed
US
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Tensioning device for chains
Assignee: Erlau AG
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Filing: 1981-12-17
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Granted: 1984-06-26
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Expires: 2001-12-17
Abstract
Abstract A tensioning device for chains such as tensioning chains, sling chains, tire chains and the like with a tensioning unit having at least one tensioning spindle which is connected with a tensioning nut and having at least one damping spring. The damping spring is a cup spring package and the cup spring package is installed in the tensioning unit. A multiplicity of the cup springs of the spring package can have a single layer and the remaining cup springs can have multilayer arrangement. More than half of the spring path, preferably approximately 80% of the entire spring path of the spring package is preloaded with a half force which is at least smaller by approximately one half than the preloading force of the remaining spring path. A control device has an indicator connected with a tensioning spindle and this indicator such as a bolt is movable, preferably is journalled longitudinally shiftable in a housing opening. The bolt is located approximately radially with respect to the tensioning spindle and preferably is secured to an abutment or ring at one end side thereof such as a plate and the bolt projects with another end into the housing having an opening therein.
Inventors
- 👤 Anton Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:15
CPC Classifications
F; F16; F16G; F16G11/00; F16G11/12; F16F; F16F1/00; F16F1/02; F16F1/32; F16F3/00; F16F3/02; Y; Y10; Y10T; Y10T24/00; Y10T24/21; Y10T24/2177; Y10T24/2181
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
358 words
A tensioning device for suspending, stretching and tightening chains, such as tensioning chains, sling chains, tire chains and the like with the device, the device comprising in combination: first and second housings, each housing having at one end thereof means for connecting the housing non-rotatably to a chain and each housing having a second end which is open; a first threaded spindle in the first housing and projecting toward the second end of the first housing, which second end is open, the first threaded spindle having a pitch threaded in one direction; a second threaded spindle in the second housing projecting toward the second end of the second housing, which second end is open, the second threaded spindle having a pitch threaded in a direction opposite the first threaded spindle; means cooperating between each spindle and each housing for preventing rotation of the spindle relative to its respective housing while permitting sliding movement of the spindle relative to its respective housing; a tensioning member extending into the second end of each housing and having oppositely handed threaded portions therein at opposite ends thereof, the threaded portions being threadably engaged with the threaded spindles wherein, when the tensioning member is rotated in one direction, the spindles move toward one another, and when the tensioning member is rotated in the opposite direction, the spindles move away from one another; the tensioning member holding the first and second housings in spaced relation and defining a space therebetween; means on the tensioning member located in the space between the housings for establishing a non-rotational relationship with the tensioning member; a tool cooperating with the means on the tensioning member for rotating the tensioning member; first abutments secured in each housing between the first and second ends thereof; second abutments on each spindle in opposed relation to the first abutments; a set of cup springs in each housing disposed between the first and second abutments, wherein when the tensioning member is turned to draw the spindles together, the cup springs are compressed, whereby a chain attached to the tensioning device can be tensioned by drawing the threaded spindles together without turning the chain.
Claim 2
Dependent Claim
358 words
A tensioning device for suspending, stretching and tightening chains, such as tensioning chains, sling chains, tire chains and the like with the device, the device comprising in combination: first and second housings, each housing having at one end thereof means for connecting the housing non-rotatably to a chain and each housing having a second end which is open; a first threaded spindle in the first housing and projecting toward the second end of the first housing, which second end is open, the first threaded spindle having a pitch threaded in one direction; a second threaded spindle in the second housing projecting toward the second end of the second housing, which second end is open, the second threaded spindle having a pitch threaded in a direction opposite the first threaded spindle; means cooperating between each spindle and each housing for preventing rotation of the spindle relative to its respective housing while permitting sliding movement of the spindle relative to its respective housing; a tensioning member extending into the second end of each housing and having oppositely handed threaded portions therein at opposite ends thereof, the threaded portions being threadably engaged with the threaded spindles wherein, when the tensioning member is rotated in one direction, the spindles move toward one another, and when the tensioning member is rotated in the opposite direction, the spindles move away from one another; the tensioning member holding the first and second housings in spaced relation and defining a space therebetween; means on the tensioning member located in the space between the housings for establishing a non-rotational relationship with the tensioning member; a tool cooperating with the means on the tensioning member for rotating the tensioning member; first abutments secured in each housing between the first and second ends thereof; second abutments on each spindle in opposed relation to the first abutments; a set of cup springs in each housing disposed between the first and second abutments, wherein when the tensioning member is turned to draw the spindles together, the cup springs are compressed, whereby a chain attached to the tensioning device can be tensioned by drawing the threaded spindles together without turning the chain.
Claim 3
Dependent Claim
33 words
A tensioning device in combination according to claim 1, in which the cup springs of said cup spring set are respectively identically embodied and are selectively arranged identically in the respective housing part.
Claim 4
Dependent Claim
32 words
A tensioning device in combination according to claim 1, in which the cup springs of said spring set are arranged alternatingly and differently at least in single layers in the housing ports.
Claim 5
Dependent Claim
31 words
A tensioning device in combination according to claim 3, in which the majority of cup springs of said spring set have one layer and the remaining cup springs have multiple layers.
Claim 6
Dependent Claim
24 words
A tensioning device in combination according to claim 4, in which said multiple layer arrangement of cup springs forms layers having differing spring numbers.
Claim 7
Dependent Claim
36 words
A tensioning device in combination according to claim 3, in which approximately 1/2 of the cup springs of said spring set are single layer, and approximately the other half thereof are arranged differently in multiple layers.
Claim 8
Dependent Claim
32 words
A tensioning device in combination according to claim 6, in which in said multi-layer half approximately 28% of the cup springs are arranged in dual layers, and approximately 25% in triple layers.
Claim 9
Dependent Claim
44 words
A tensioning device in combination according to claim 1, in which more than half of the spring path of the spring set is preloaded with half force which is at least smaller by approximately 1/2 than the preloading force of the remaining spring path.
Claim 10
Dependent Claim
21 words
A tensioning device in combination according to claim 8, in which 80% of the spring path is preloaded with half force.
Claim 11
Dependent Claim
17 words
A tensioning device in combination according to claim 1, which includes a plurality of cup spring sets.
Claim 12
Dependent Claim
16 words
A tensioning device in combination according to claim 10, in which each set includes differing layers.
Claim 13
Dependent Claim
60 words
A tensioning device in combination according to claim 1, in which the means for preventing rotation of the spindle relative to the housing includes bolt means fixed to the threaded spindles to secure the threaded spindles against rotation and an axially extending slot which receives the bolt means to allow the threaded spindles to slide while being held against rotation.
Claim 14
Dependent Claim
26 words
A tensioning device in combination according to claim 12, in which said bolt means is provided on an abutment-wall plate means of said tensioning spindle means.
Claim 15
Dependent Claim
22 words
A tensioning device in combination according to claim 12, in which said bolt means is located radially of said tensioning spindle means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |